int findb(string substring [len] [from])
string - string to search in. Must be str variable.
substring - substring to find. Can be string or pointer to binary data.
len - number of bytes in substring. Default: if substring is string - substring length, otherwise this parameter is required.
from - 0-based character index, from which to start search. Default 0.
Returns 0-based index of first character of substring in string. If not found, returns -1. Both strings can contain binary data (null characters).
str s="one two"; s[3]=0 now s contains null character at position 3 int i=findb(s "e[0]t" 3) now i is 2